F604ZZ flanged ball bearing – 4 × 12 × 4 mm, 13.5 mm flange

The F604ZZ is a miniature radial ball bearing with a 4 mm inner diameter, an integrated flange and metal shields on both sides. It is intended for small rotating mechanisms used in 3D printers, CNC machines, extruders, guides, pulleys and electronics or automation projects.

The flange provides a lateral shoulder against the housing, helping define the axial position of the bearing and preventing it from passing through a cavity designed with a flange stop.

Nominal F604ZZ dimensions

• Inner diameter: 4 mm.
• Bearing body outer diameter: 12 mm.
• Bearing width: 4 mm.
• Flange outer diameter: 13.5 mm.
• Nominal flange thickness: 1 mm.
• Type: flanged radial ball bearing.
• Protection: ZZ metal shields on both sides.

The specified dimensions are nominal. Because the specific manufacturer is not identified, small differences may exist in tolerances, internal clearance, flange thickness or lubrication. Measure the received product before producing a housing with a tight fit.

Compatibility and applications

Installation requires a 4 mm shaft or screw, a housing for the 12 mm bearing body, 4 mm of available width and clearance for the 13.5 mm flange.

Compatibility with a particular printer, extruder or mechanism must be checked using its dimensions and operating conditions. The F604ZZ reference alone does not guarantee that it can replace every visually similar bearing.

This is a radial bearing. The flange assists with positioning, but it does not turn the product into a thrust bearing or guarantee retention against significant axial loads.

Installation recommendations

• Prepare a clean, aligned and burr-free housing.
• Do not install the bearing using direct hammer blows.
• Apply force only to the ring being fitted.
• Avoid deforming the flange or metal shields.
• Check that the bearing rotates freely after installation.
• Do not expose it to water, fine dust or heavy contamination without additional protection.

Other flanged sizes

For larger shaft diameters, consider the F625ZZ for 5 mm shafts or the F688ZZ for 8 mm shafts. These references have different dimensions and are not interchangeable with the F604ZZ.

Package contents: 1 F604ZZ bearing.